Another option is to capture audio output from eg. Real Player, by simply
instructing Real Player to output to /dev/sound1, and running:

$ cat /dev/pad0 > blah.pcm''

To find out what /dev/sound* device to use, use dmesg(8)
output - Jared tells me that
``/dev/soundN and /dev/audioN are the same device; the only difference is
behaviour on open -- /dev/audioN emulates traditional Sun audio behaviour
and resets the device to a known configuration, whereas /dev/soundN uses the
previous device state.